The growth of switching has (135) a new generation of network management tools that help (136) cope with the challenges, (137) them to correlate device alarms in order to (138) pinpoint root causes, or to monitor service levels without depending on IP subnet schemes. These new tools have become essential to coping with the primary (139) effect of any treatment that significantly increases network flexibility: added complexity.

A．back

B．side

C．front

D．lateral

实行财政直接支付方式的事业单位，应于收到“财政直接支付入账通知书”时，一方面增加零余额账户用款额度，另一方面确认财政补助收入。( )